Mercury in Glass Thermometer

The mercury in glass thermometer is a traditional temperature measuring tool that consists of a glass tube filled with mercury, which expands or contracts as the temperature changes. It is widely used in laboratories, medical and industrial fields.

Product Parameters

Structural composition
1. Glass shell: usually made of borosilicate glass, with good thermal and chemical stability.
2. Mercury column: The liquid inside the thermometer, usually mercury, has high density and low surface tension, which can clearly show temperature changes.
3. Scale: The scale on the thermometer shell is used to read the temperature value, usually in degrees Celsius (°C) or Fahrenheit (°F).
4. Expansion chamber: A small glass ball located at the top of the thermometer, used to accommodate the expansion of mercury at high temperatures to prevent the thermometer from breaking.

Advantages
1. Accuracy and Precision: High accuracy over the specified range when properly calibrated and read (±0.1°C or better for lab-grade instruments).
2. Stability: Mercury's coefficient of expansion is very stable. If undamaged, readings will be reliable over long periods of time.
3. Wide Range: Measurements range from -37°C (mercury's freezing point) to over 500°C (depending on glass type).
4. Direct Reading: No external power source required; easy visual reading.
5. Linearity: Mercury expands relatively linearly with temperature changes over its liquid range.
6. Immersion Flexibility: Can be designed for full, partial, or complete immersion applications.

Safety precautions
1. Avoid breakage: Handle the thermometer with care during use to avoid impact or drop.
2. Handle leaks: If the thermometer breaks, take immediate steps to clean up the leaked mercury. Use 3. Sulfur powder to cover the mercury beads to convert them into mercuric sulfide, then carefully collect and dispose of them.
4. Good ventilation: When handling mercury, ensure that the work area is well ventilated to avoid inhaling mercury vapor.
5. Professional handling: If a large amount of mercury leaks, contact professionals for cleanup and disposal.